robinson



(Model.)

O. E. ROBINSON.

Y LOOK HINGE. No. 307,593. Pawnted Nov.. 4, 1884.

NESSES A UNTTnn STATES PATENT Orrrcn.

CHARLES ROBINSON, OF BROOKLYN, .NEW YORK.

LOCK-HINGE.

SPECIFICATION forming part of Letters Patent No. 307,593, dated November4, 1884.

Application filed October 2i', 1883. (Model.)

Locking-Hinge, of which the following is a specication.

My invention relates to a style of lockinghinge more especially adaptedfor blinds and iO shutters; and it consists in providing the Itrated inthe accompanying leaves of a hinge with a curved arm projection, acircular plate, a finger projection, lever-seat projection with leverand spring-bolt. I attain these objects by the mechanism illusdrawings,in Which- Figure l is a vertical section of the entire hinge as open.Fig. 2 is a horizontal vicWof the hinge, showing the locking-bolt andattendent connections. Fig. 3 is a verticalsection of the hinge asclosed.

Let A represent that part Or leaf of the hinge attached to thewindow-i'rame; B, the other half or leaf of the hinge attached to theblind or shutter. On the leaf of the hinge A is a circular plate seatedupon a curved arm. From the .center of the circular plate rises thepintle a, on which the leaf B swings.

O is a circular plate With radial apertures c. The arm ofthe leafA,supporting the circular plate C, is made curved, as shown by the dottedlines in Fig. 2. This is for the purpose of allowing the blind orshutter to projectahalf of an inch over the side of the Window-frame toexclude the rays of the sun when closed. Attached to the leaf Bisaiinger projection, b, either cast thereon' or made Oi' a separate pieceof metal, for the purpose of retaining the forenger of the hand inoperating the locking bolt D.

B is an elongated tubular projection on the leaf B, containing thelocking-bolt D and spring c; A projection,f, on the leaf B is for a seatfor the leverf. One end of this lever is inserted in an aperture in theend of the locking-bolt D. The locking-bolt D is forced into the radialapertures c in the circular plate O by means ofthe spiral spring c. Thetop of the tubular projection B is extended over the circular plate (l,in Order to form an absolute protection for the locking-bolt D at itspoint of entrance into the apertures c, in order that the bolt D cannotbe tampered with and the hinge unlocked except by a movement of thelever f. The lever f is securely protected by the stile of the blind orshutter, as shown by the dotted lines in Fig. 2. The hinge is -operatedby placing the forefnger of the hand against the linger projection b andthe thumb on the leverf. A movement of the lever f toward thefinger-piece b withdraws the bolt from the apertures c, and the hingecan then be opened or shut, as desired.

I have described my invention as being applied to a blind or shutterhinge; but itis not of necessity confined to this form Of hinge.

Having fully described my invention, what I desire to claim and secureby Letters Patent 1sf The combination of the stationary leaf of a hinge,made with a curved arm supporting a circular plate, with the movable orswinging leaf of a hinge, made With a finger and leverseat projectionprovided With a locking-bolt and thumb-lever, substantially as and forthe purpose set forth.

GHARLESE. ROBINSON. [L s] Vitnesses: 4

GEO. H. PENDLETON, D. R. MOREA.

